Rincón de la Vieja Eruptions Continue in Costa Rica
OVSICORI-UNA reported a series of phreatic eruptions at Rincón de la Vieja in August 2026, including two on 23 August. The observatory recorded 14 eruptions in early August and two more on 11 August. The post Rincón de la Vieja Eruptions Continue in Costa Rica appeared first on The Rio Times .
Costa Rica's Rincón de la Vieja volcano continued to erupt in August 2026, according to the country's volcano observatory. The latest pair of phreatic eruptions occurred on the morning of Sunday, 23 August. These steam-driven blasts were recorded by the observatory, OVSICORI-UNA, which published a bulletin about the events. The first eruption struck at 7:38 a.m., followed by a smaller one at 00:30.
No further details on the eruptions have been released, including estimates of plume height. Earlier in the month, on 11 August, two energetic phreatic eruptions were also recorded, reaching about 1,000 metres above the summit. Phreatic eruptions occur when groundwater heated by the volcano flashes to steam, ejecting water, gas, and shattered rock.
Unlike other volcanic activity, these blasts do not involve fresh molten rock reaching the surface. Observations show that background tremor, or 'tremor de fondo', decreased after an eruption in early August, but eruptions resumed later in the month. OVSICORI-UNA, the state body that monitors Costa Rica's volcanoes, has not provided any forecast or assessment of what might happen next.
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